Paper article and method of making same



3o disintegrated in beating operations,- particularly Patented Jan. II9, 1937 UNITED sTATas PATENT OFFICE PAPER ARTICLE AND amrnon or mamasum George J. Manson, Hawkesbury, Ontario, Can- I ada, assignor ofone-half to Nathaniel L. Foster, New York, N. Y;

No Drawing. Application June 24; 1931, Serial No. 548.672

13 Claims.

This invention relates to Paper products and to methods of producing thesame, and also to compositions utilized in the manufacture of such paperproducts. y

' 5 The preparation of laminated products comprising two or more sheetsof paper cemented together by an adhesive, is carried out in the priorart by the use of asphalt emulsions or of straight asphalt as the binderor adhesive. Such asphalt emulsionor straight asphalt provides a bindinglayer between the plies of'paper, which layer is impervious to moisture.Since, however, the as-- .phalt emulsions or asphalt employed for suchbinders, is black or very dark in color, it is not 'possible to use thetrim from the sheets of paper or board Joined together by asphalt ,inthe pro duction of anything but a dark product. That is,

when an attempt is made to reuse the trim from suchlaminated prior artproducts, due to the presence ofthe dark cementing material, the finalproduct obtained by reuse of the trim is necessarily dark in color.Further, the asphalt material present in such trim is not as readilyemulsifled or broken up in beating operations as is de 11 sirable.

# Among the objects vof the-present invention is the production of lightcolored adhesives utilizable as the hinder or cementing gent iii-theproduction of laminated products such as .lami- I nated'paper board,which adh are readily in the presence of v A further oblect of thepresent invention is the "production of laminated paper productsutilizing the adhesives referred to above.

A still further object of the present invention includes the productionof paper products from beaten trim of the laminated materials referred'toabovem i Stillfurther and other objects and advantages will appearfrom the more detailed description set 'forth below, it being understoodhowever that this more detailed description is given by way of vexplanation and-illustration only, and not by way of limitation, sincevarious changes may be, made in that more detailed descrlptionby thoseskilled in the art, without departing from the scope and spirit of thepresent'invention. o v The present invention is'thus concerned with 5bthe productionfof laminated products. particularly the type consistingof two .or more piles of paper material cemented together by adhesivesor bindlng or'cementing agents; In accordance with the present inventionsuch adhesives are used which so are light-colored, and which aresufllciently moistureproof, to render the laminated product resistant tothe passage 01 atmospheric moisture. While the adhesive thus'employed issuiiiciently moistureproof in its use in these laminated-products, it isconstituted of materials that are readily 5 dis integrated duringbeating operations as in beaters'employed in paper manufacture, so thatthe trim from suchlaminated products which has heretofore in the artbeen a relatively waste product and utllizable only in the production ofdark- 10 colored paper, may be re-utilized when such trim is obtainedfrom the laminated products produced in accordance with the presentinvention, and such reconstituted trim enabling sheeted materials oflight color to be readily obtained. 15

Exemplary of the light-colored adhesive compositions employed inaccordance with themes-- ent invention, there is utilized as the basicmaterial for such adhesives, a saponiilable natural r'esin,-that isaresinof acidic nature of which v a rosin is exemplary. The resinouscomponentoi' the. adhesive constitutes the bulk thereof, the

resin being compounded with oils selected from composition possessespronounced adhesive propcities," but at the same time is capable ofbeing readily disintegrated during heating operations, particularly inthe presence of alkali. Such compositions also have light color whichparticularly adapt them for the purposes in hand. 40 While rosin hasbeen given above as the preierred'type of natural resin, other naturalresins of acidic character yielding saponiflable compositions mayreadily be employed. The 011 com-.

nent maybe either, of the mineral oil typeor 5 f the glyceride oil type.or in the preferred in stance, the composition will include both typesof oils, the glycerlde oil being the minor amount of the oil component.Of the mineral and hy- "drocarbonoils, a preferred exemplary constituentis Russian petroleum or other mineraLhydrocarbons that have the generalphysical characteristics of Russian petroleum The glyceride oils includeboth the anlmal and vegetable oils, and

while dryingoils are preferred, the semi-drying and non drym vegetableand also. be utilized In order that the composition have the desiredpronounced adhesive properties, it is preferred that the resin contentinclude from 70-80% oi resin, the remainder constituting the-oilcomponent, and when both mineral and glyceride oils are present, theglyceride oil constitutes but a minor amount of the total oil component.A preferred example of such light-colored adhesive includes 70-80%.rosin, Russian petroleum, and a-small amount-oi linseed oil. I

These lightcolored adhesives produced in accordance with the descriptiongiven above are particularly importantin producing laminated materials,as for example by cementing together two or more plies of paper by means0! these adhesives. A laminated paper product is thus obtained whichotters adequate resistance to moisture, but the nature of the adhesiveenables the trim from such laminated products to be readilyreconstituted into apulp material by treatment in a paper beater,particularly in the presence of alkali. Such trim is readilydisintegrated in the beat-' ing operation, and a pulp material isobtained thay be sheeted on ordinary paper-making or m -mal:ingmachines. Due to the fact that the reconstituted pulp is obtained iromthe trim resulting in the production oi! the laminated materials, andcontaining adhesives that are light colored, the resulting reconstitutedpulp irom such trim is light in color and enables lightcolored 'sheetedmaterials to be obtained.

animal oils may Rosin Ole'ic aclil m mneralo L Exampleli v gms-..

EmmplcIIt. 0.

Rosin Linseedoi EzampIe'IV- Rosin 1 Linseed oil 10 Oleic acid 20 Theseadhesives of the present invention are 00 primarily for adhesives inpreparing laminated material as the binder betweensuch laminated laynently sui While they are not particularly suggested Ior outerprotective coatings on articles, their to atmospheric moisture issuflicient for use as the binder in laminated prodnets and for relatedpurpo Havingthus set forth my invention, I claim: 1.111 a process ofproducing paper. products,

the step which trim of a laminated material carrying a light-coloredadhesive consisting of a saponiflable natural resin, and an oil selectedfrom the group consisting of mineral and glyceride oils to produce alight-colored matrix is called a positive real gms" no the step whichcomprises beating trim of a lamif For example, paper containing-therosin moisfor which purpose they are emiive the adhesive components fromthe trim. and capable of being sheeted on a paper making machine. I

2. In a process of producing paper products,

nated material carrying a light-colored adhesive consisting of asaponiflable resin, and an oil selected irom the group consisting oimineral and glyceride oils, in the presence of an alkali to saponiiy theadhesive to produce a light-colored reconstituted pulp ntainingsubstantially all of Y the adhesive components lrom the trim, a1idcapable of being sheeted on a paper making machine. Y

3. In a process ofproducing paper products, 15

the step which comprises beating trim of a laminated material carrying alight-colored adhesive consisting oi 70-80% rosin, a mineral oil havingthe characteristics of Russian petroleum, and a small amount of linseedoil to produce a lightcolored reconstituted pulp containing substantial-1y all of the adhesive components from the trim, and capable oi beingsheeted on a paper making machine.

4. In a process of producing paper products; the steps whichincludebeating trim of a laminated material carrying a light-coloredadhesive consisting of a saponiilable natural resin, and an all selectedfrom the group consisting of mineral andglyceride oils to produce alight-colored rcconstituted pulpcontaining substantially all of theadhesive components from the *trim, and capable of being sheeted on apaper making machine, and sheeting the beaten trim.

5. In a process or producing paper products. the steps which comprisebeating trim or a laminated material carrying a light-colored adhesiveconsisting of 70-80% rosin, a mineral oil having the characteristics oiRussian petroleum, and a small amount of linseed oil, and sheeting thebeaten trim.

6. An article of manufacture comprising a lami nated product, the pliesof which are rigidlycemented together by a lightcolored adhesiveconsisting of a saponiflable natural resin and an oil 45 selected fromthe group consisting of mineral and glyceride oils, the amount of resinin the composition being suihcient -to give the coitllpllsitionpronounced adhesive properties.

'I. An article or manufacture comprising ago laminated paper board madeof piles of paper rigidly cemented together by a light-colored adhesiveconsisting of a 'saponiflable natural resin! and an oil selected fromvthejgroup'consisting of mineral and'glyceride oils, the amount 01 resinall in the' composition being suilicient to give the compositionprohounced adhesive properties.

8. An article of manufacture comprising a laminated paper board made ofpiles of paper r idly cemented togetherby alight-colored adso hesiveconsisting oi a saponiiiable natural resin and a small amount of adrying oil, the amount of resin in the composition being suilicienttothe composition pronounced adhesive properties.- a 9. An article ofmanufacture comprising a laminated paper board made of piles of papercemented together by a light-colored adhesive consisting of 70-80%,rolsin, a mineral oil having the characteristics oi, Russian petroleum,and 70 a small'amount oi linseed oil.

10. A paper. product comprising beaten trim ot alaminated paper.material carrying a cementing agent consisting of a light-coloredadhesive made or asaponiflable natural resin and an oil nated paperproducts,

selected from the group consisting of mineral and glyceride oils.

11. A paper product comprising beaten trim of a laminated paper materialcarrying a lightcolored cementing agent consisting of 70-80% rosin, amineral oil having the characteristics of Russian petroleum, and a smallamount of linseed oil.

12. In a process of moisture resistant. readily disintegrable, lami--the steps which include beating moisture resistant, readilydisintegrable trim of a laminated material carrying a lightcoloredadhesive consisting of a saponiiiable natural resin, and an oil selectedfrom the group consisting of mineral and giyceride oil's, sheeting thebeaten trim, and forming a moisture resistant, readily disintegrablelaminated board from said sheeted beaten trim by cementing at least twosheets thereof togetherby a light colmoisture resistant,

producing light colored,

tural resin, and an oil selected from the group presence of an alkali tosheeting the beaten trim, and forming a moisture" disintegrablelaminated board 3 ored adhesive consisting 01' a saponiflable naturalresin and an oil selected from the group consisting'of mineral andglyceride oils.

13. In a process oi producing light colored,

readily disintegrabie, laminated paper products, the steps which includebeating moisture resistant, readily disintegrable trim of a laminatedmaterial carrying a light colored adhesive consisting oi. a saponiflablenamineral and glyceride oils, in the saponity the adhesive,

consisting oi resistant, readily from said sheeted beaten trim bycementing at least two sheets thereof together by a light coioredadhesive consisting of a saponiiiable resin and an oil selected from thegroup consisting oi mineral and glyceride oils. 7

GEO. J. MANSON.

